<template>
    <div>
        <!-- 面包屑导览 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <el-alert
                title="注意: 只允许查询第三级"
                type="warning"
                :closeable="false"
                show-icon>
            </el-alert>

            <!-- 选择商品分类-->
            <el-row class="cat_opt">
                <el-col>
                    <span>选择商品分类: </span>
                    <el-cascader
                    expand-trigger="hover"
                    :options="catelist"
                    :props="{ value: 'cat_id', label: 'cat_name', children: 'children'}"
                    v-model="slesctedCateKeys"
                    @change="handleChange"
                    clearable
                    checkStrictly>
                    </el-cascader>
                </el-col>
            </el-row>

            <!-- tab页签区域 many动态参数-->
             <el-tabs v-model="activeName" @tab-click="handleTabClick">
                <!-- 添加动态参数-->
                <el-tab-pane label="动态参数" name="many">
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加参数</el-button>
                        <!--动态参数表格-->
                        <el-table :data="manyTableData" border stripe>
                            <!-- 展开行-->
                            <el-table-column type="expand">
                                <template slot-scope="scope">
                                 <!-- 循环渲染tag标签 添加按按钮 输入文本框-->
                                    <el-input
                                    class="input-new-tag"
                                    v-if="scope.row.inputVisible"
                                    v-model="scope.row.inputValue"
                                    ref="saveTagInput"
                                    size="small"
                                    @keyup.enter.native="handleInputConfirm(scope.row)"
                                    @blur="handleInputConfirm(scope.row)">
                                    </el-input>
                                    <!-- 添加按钮 -->
                                    <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                                    <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>
                                </template>
                            </el-table-column>
                            <!-- 索引列 -->
                            <el-table-column type="index"></el-table-column>
                            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                            <el-table-column label="参数">
                                <template slot-scope="scope">
                                    <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">修改</el-button>
                                    <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                                </template>
                            </el-table-column>
                        </el-table>
                    </el-tab-pane>
                <!-- 添加静态属性  only静态属性-->
                <el-tab-pane label="静态属性" name="only"><el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加属性属性</el-button>
                <!--静态参数表格-->
                        <el-table :data="onlyTableData" border stripe>
                            <!-- 展开行-->
                             <el-table-column type="expand">
                                <template slot-scope="scope">
                                 <!-- 循环渲染tag标签 添加按按钮 输入文本框-->
                                    <el-input
                                    class="input-new-tag"
                                    v-if="scope.row.inputVisible"
                                    v-model="scope.row.inputValue"
                                    ref="saveTagInput"
                                    size="small"
                                    @keyup.enter.native="handleInputConfirm(scope.row)"
                                    @blur="handleInputConfirm(scope.row)">
                                    </el-input>
                                    <!-- 添加按钮 -->
                                    <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                                    <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>
                                </template>
                            </el-table-column>
                            <!-- 索引列 -->
                            <el-table-column type="index"></el-table-column>
                            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                            <el-table-column label="操作">
                                <template slot-scope="scope">
                                    <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">修改</el-button>
                                    <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                                </template>
                            </el-table-column>

                        </el-table>
                </el-tab-pane>
            </el-tabs>
        </el-card>

        <!-- 添加参数的对话框-->
        <el-dialog
        :title="'添加' + titleText"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed">
            <!-- 添加参数的对话框-->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
                <el-form-item :label="titleText" prop="attr_name">
                    <el-input v-model="addForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addParams">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改参数对话框-->
        <el-dialog
        :title="'修改' + titleText"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed">
            <!-- 添加参数的对话框-->
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
                <el-form-item :label="titleText" prop="attr_name">
                    <el-input v-model="editForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editParams">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
      // 接收商品分类列表
      catelist: [],
      // 级联选择框配置对象
      //   cateProps: {
      //     value: 'cat_id',
      //     label: 'cat_name',
      //     children: 'children'
      //   }
      // 级联双向绑定数组
      slesctedCateKeys: [],
      // 被激活页签的名称
      activeName: 'many',
      //   动态参数数据
      manyTableData: [],
      // 静态属性数据
      onlyTableData: [],
      // 添加对话框的显示隐藏
      addDialogVisible: false,
      // 添加表单数据对象
      addForm: {},
      // 添加表单验证规则
      addFormRules: {
        attr_name: [{ required: true, message: '请输入参数名称', trigger: 'blur' }]
      },
      // 控制修改表单对话框显示隐藏
      editDialogVisible: false,
      // 修改表单对象
      editForm: {},
      // 修改表单验证规则
      editFormRules: {
        attr_name: [{ required: true, message: '请输入参数名称', trigger: 'blur' }]
      }
    }
  },
  created () {
    // 所有商品列表的周期函数
    this.getCateList()
  },
  methods: {
    // 获取所有列表的商品分类
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('商品分类失败')
      }
      this.catelist = res.data
    //   console.log(this.catelist)
    },
    handleChange () {
      this.getParamsDate()
    },
    // tab页签点击事件处理函数
    handleTabClick () {
      this.getParamsDate()
    //   console.log(this.activeName)
    },
    // 获取参数列表数据
    async getParamsDate () {
      // 证明选择的不是三级分类
      if (this.slesctedCateKeys.length !== 3) {
        this.slesctedCateKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return this.$message.error('不是三级分类')
      }
      // 这里 选择下拉菜单后 长度是3
      // console.log(this.slesctedCateKeys)
      // 选择三级分类后 根据所选id 和面板 获取对应参数
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: this.activeName } })
      if (res.meta.status !== 200) {
        // console.log(res.data)
        return this.$message.error('获取参数列表失败')
      }
      console.log(res.data)
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        // 控制文本框显示与隐藏
        item.inputVisible = false
        // 文本框输入的值
        item.inputValue = ''
      })
      console.log(res.data)
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    // 添加对话框的关闭属性 去除提示
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 添加点击按钮 添加参数
    addParams () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, { attr_name: this.addForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败')
        }
        this.addDialogVisible = false
        this.getParamsDate()
        return this.$message.success('添加参数成功')
        // eslint-disable-next-line no-unreachable
      })
    },
    // 点击按钮 展示 修改对话框
    async showEditDialog (attrId) {
      // 查询当前参数信息
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${attrId}`, { params: { attr_sel: this.activeName } })
      this.editDialogVisible = true
      if (res.meta.status !== 200) {
        return this.$message.error('添加参数失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 重置修改表单
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 点击按钮 修改参数
    editParams () {
      // 拿到表单引用  validate进行验证
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 前面是获取 api方式 后面是api 的属性
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, { attr_name: this.editForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败')
        }
        this.editDialogVisible = false
        this.getParamsDate()
        return this.$message.success('修改成功')
      })
    },
    // 根据id删除对应的参数  每个方法都传值了 所以将获取的值接收
    async removeParams (attrId) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.success('已取消删除')
      }
      // 删除业务逻辑
      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attrId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败')
      }
      this.getParamsDate()
      return this.$message.success('修改成功')
    },
    // 文本框失去焦点或按下了enter 都会触发
    async handleInputConfirm (row) {
      console.log('ok')
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return this.$message.error('输入的内容为空')
      }
      // 如果没有返回 则表示输入了内容
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      // 发起请求保存操作
      this.saveAttrVals(row)
    },
    // 对attr_vals进行封装
    async saveAttrVals (row) {
      // 发起请求保存操作
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, { attr_name: row.attr_name, attr_sel: row.attr_sel, attr_vals: row.attr_vals.join(' ') })
      if (res.meta.status !== 200) {
        console.log(res.data)
        return this.$message.error('修改参数失败')
      }
      return this.$message.success('修改成功')
    },
    // 点击按钮 展示文本输入框
    showInput (row) {
      row.inputVisible = true
      // 让文本框获得焦点 $nextTick方法 当页面被重新渲染会指定回调函数中代码
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    // 删除对应的参数可选项
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    }
  },
  // 计算属性
  computed: {
    // 如果按钮被禁用返回 true 否则 false
    isBtnDisabled () {
      if (this.slesctedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    // 选中的三级分类id
    cateId () {
      if (this.slesctedCateKeys.length === 3) {
        return this.slesctedCateKeys[2]
      }
      return null
    },
    // 根据动态参数计算标题文本
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style lang="less" scoped>
.cat_opt{
    margin: 15px 0px
}

.input-new-tag{
    width: 120px;
}

.el-tag{
  margin: 5px;
}
</style>
